arm64: tegra: Add QSPI controllers on Tegra234

This adds the QSPI controllers on the Tegra234 SoC and populates the
SPI NOR flash device for the Jetson AGX Orin platform.

Signed-off-by: Ashish Singhal <ashishsingha@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra234-p3701-0000.dtsi

@@ -7,6 +7,18 @@
 	compatible = "nvidia,p3701-0000", "nvidia,tegra234";
 
 	bus@0 {
+		spi@3270000 {
+			status = "okay";
+
+			flash@0 {
+				compatible = "jedec,spi-nor";
+				reg = <0>;
+				spi-max-frequency = <102000000>;
+				spi-tx-bus-width = <4>;
+				spi-rx-bus-width = <4>;
+			};
+		};
+
 		mmc@3460000 {
 			status = "okay";
 			bus-width = <8>;

arch/arm64/boot/dts/nvidia/tegra234.dtsi

@@ -654,6 +654,20 @@
 			reset-names = "i2c";
 		};
 
+		spi@3270000 {
+			compatible = "nvidia,tegra234-qspi";
+			reg = <0x3270000 0x1000>;
+			interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			clocks = <&bpmp TEGRA234_CLK_QSPI0_2X_PM>,
+				 <&bpmp TEGRA234_CLK_QSPI0_PM>;
+			clock-names = "qspi", "qspi_out";
+			resets = <&bpmp TEGRA234_RESET_QSPI0>;
+			reset-names = "qspi";
+			status = "disabled";
+		};
+
 		pwm1: pwm@3280000 {
 			compatible = "nvidia,tegra194-pwm",
 				     "nvidia,tegra186-pwm";
@@ -666,6 +680,20 @@
 			#pwm-cells = <2>;
 		};
 
+		spi@3300000 {
+			compatible = "nvidia,tegra234-qspi";
+			reg = <0x3300000 0x1000>;
+			interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			clocks = <&bpmp TEGRA234_CLK_QSPI1_2X_PM>,
+				 <&bpmp TEGRA234_CLK_QSPI1_PM>;
+			clock-names = "qspi", "qspi_out";
+			resets = <&bpmp TEGRA234_RESET_QSPI1>;
+			reset-names = "qspi";
+			status = "disabled";
+		};
+
 		mmc@3460000 {
 			compatible = "nvidia,tegra234-sdhci", "nvidia,tegra186-sdhci";
 			reg = <0x03460000 0x20000>;

include/dt-bindings/clock/tegra234-clock.h

@@ -140,6 +140,14 @@
 #define TEGRA234_CLK_PEX2_C9_CORE		173U
 /** @brief output of gate CLK_ENB_PEX2_CORE_10 */
 #define TEGRA234_CLK_PEX2_C10_CORE		187U
+/** @brief CLK_RST_CONTROLLER_CLK_SOURCE_QSPI0 switch divider output */
+#define TEGRA234_CLK_QSPI0_2X_PM		192U
+/** @brief CLK_RST_CONTROLLER_CLK_SOURCE_QSPI1 switch divider output */
+#define TEGRA234_CLK_QSPI1_2X_PM		193U
+/** @brief output of the divider QSPI_CLK_DIV2_SEL in CLK_RST_CONTROLLER_CLK_SOURCE_QSPI0 */
+#define TEGRA234_CLK_QSPI0_PM			194U
+/** @brief output of the divider QSPI_CLK_DIV2_SEL in CLK_RST_CONTROLLER_CLK_SOURCE_QSPI1 */
+#define TEGRA234_CLK_QSPI1_PM			195U
 /** @brief CLK_RST_CONTROLLER_CLK_SOURCE_SDMMC_LEGACY_TM switch divider output */
 #define TEGRA234_CLK_SDMMC_LEGACY_TM		219U
 /** @brief output of gate CLK_ENB_PEX0_CORE_0 */

include/dt-bindings/reset/tegra234-reset.h

@@ -40,6 +40,8 @@
 #define TEGRA234_RESET_PWM6			73U
 #define TEGRA234_RESET_PWM7			74U
 #define TEGRA234_RESET_PWM8			75U
+#define TEGRA234_RESET_QSPI0			76U
+#define TEGRA234_RESET_QSPI1			77U
 #define TEGRA234_RESET_SDMMC4			85U
 #define TEGRA234_RESET_UARTA			100U
 #define TEGRA234_RESET_PEX0_CORE_0		116U